How to bevel inside like Mario's coin
Add a Plane and make it rectangular shape scaling in x axis

Apply scale Ctrl+A -> Scale

Select the plane in Edit mode -> Select the 4 verts and Press Ctrl+Shift+B to Bevel

Select all and press E to Extrude

Select all and press Ctrl+ N to normal faces

Select the circle and Add a Edge Modifier &amp; a Boolean Modifier with the target of plane

Add Bevel Modifier

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